/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.flink.sql.parser.ddl;

import org.apache.calcite.sql.SqlIdentifier;
import org.apache.calcite.sql.SqlNode;
import org.apache.calcite.sql.SqlWriter;
import org.apache.calcite.sql.parser.SqlParserPos;

import java.util.List;

import static java.util.Objects.requireNonNull;

/** ALTER MODEL [IF EXISTS] [[catalogName.] dataBasesName.]modelName RENAME TO newModelName. */
public class SqlAlterModelRename extends SqlAlterModel {

    private final SqlIdentifier newModelName;

    public SqlAlterModelRename(
            SqlParserPos pos,
            SqlIdentifier modelName,
            SqlIdentifier newModelName,
            boolean ifModelExists) {
        super(pos, modelName, ifModelExists);
        this.newModelName = requireNonNull(newModelName, "newModelName should not be null");
    }

    public SqlIdentifier getNewModelName() {
        return newModelName;
    }

    public String[] fullNewModelName() {
        return newModelName.names.toArray(new String[0]);
    }

    @Override
    public List<SqlNode> getOperandList() {
        return List.of(name, newModelName);
    }

    @Override
    public void unparseAlterOperation(SqlWriter writer, int leftPrec, int rightPrec) {
        super.unparseAlterOperation(writer, leftPrec, rightPrec);
        writer.keyword("RENAME TO");
        newModelName.unparse(writer, leftPrec, rightPrec);
    }
}
